File: iter-range.rs

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rustc 1.88.0%2Bdfsg1-2
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//@ run-pass


fn range_<F>(a: isize, b: isize, mut it: F) where F: FnMut(isize) {
    assert!(a < b);
    let mut i: isize = a;
    while i < b { it(i); i += 1; }
}

pub fn main() {
    let mut sum: isize = 0;
    range_(0, 100, |x| sum += x );
    println!("{}", sum);
}